Hard to Digest Foods: Are You Ready for Some Surprises?
By: Julie Mancuso, B.A., R.H.N., JM Nutrition
In this post:
list of foods that are hard to digest
the underlying reasons why these foods are difficult for the digestive system
Some foods are hard to digest, pure and simple.
It’s also a fact that most of us experience some form of digestive problem at one point or another, no matter how robust the digestive system. For many of us, the digestive distress is often caused by the foods we eat. Some of these are well-known while others will surprise.
My personal struggle with digestive health
Reducing digestive distress is naturally important to me professionally, but also personally because I’ve been struggling with all sorts of gastro-intestinal problems the better part of my adult life.
In fact, it was the primary reason why I decided on a career as a nutritionist over fifteen years ago. You can read about how my own health problems led to my becoming a nutritionist here.
In all honesty, I still find food digestion challenging at times, but it sure has gotten better since I improved my own eating habits.
I’ve learned a great deal about digestion from extensive research, personal experience, countless consultations with medical practitioners and the experience of my clients.
What’s more, I’ve learned a great deal about what foods are hard to digest and which are more benign. To this day, I always choose what I eat based on the effect it has on my digestive system.
Poor digestion can no doubt lead to frustration. Sometimes determining the root cause of digestive problems takes time, a great deal of time. Besides, the grumbling, churning and general discomfort makes it hard to enjoy life, especially food.
Some hard to digest foods are commonly known, while others are not
To alleviate digestive distress, start with food first.
We all know that if we consume large amounts of fatty, greasy, fried, salty or sweet foods, we are likely to trigger some form of digestive discomfort. This can range from slight churning in some to debilitating cramps and pain in others.
But other, less obvious hard to digest foods exist. These foods can also greatly upset the digestive system, causing rumbling, gas and pain.
Hard to Digest Foods
Raw onions can be hard to digest, for some.
Onions can cause a good deal more than just leaving you with that pungent onion-breath. Some people pass gas and feel digestive discomfort after eating onions in their raw form, while others burp and bloat.
Why are onions hard to digest?
Onions are hard to digest largely because they contain fructans, which are not absorbed well in the small intestine. In fact, as fructans ferment, they can cause a great deal of digestive distress in the form of bloating, gas and diarrhea.
I recommend avoiding raw onions if your digestive system is sensitive.
Which foods contain fructans?
- onions & shallots, as mentioned
- some cereals & grains (wheat, rye, barley, etc.)
- savoy cabbage
- Brussels sprouts
- ripe bananas
- dried fruit
- chicory root
- and others
Tips to reduce the digestive upset of onions
If you’re just not prepared to give up eating raw onions and must have them on your burger or sandwich, reduce the portion. If the symptoms are reduced or go away altogether, you know you found the cause.
Another way to reduce the severity of the mentioned symptoms is to cook the onions.
Furthermore, you can take digestive enzymes to help to alleviate some of these gastrointestinal disturbances caused by raw onions.
When considering taking supplements, it is always a good idea to seek the help of a qualified practitioner who can help you select the right digestive enzymes. Please don’t take it upon yourself to do so.
Raw fruits and vegetables
And you thought all fruits and vegetables were good for you…
Well, they no doubt are, for a number of reasons.
Some people, however, experience gastrointestinal problems when digesting certain fruits and vegetables. This fact is often omitted from lists of hard to digest foods.
Fruits and vegetables, however, may upset digestion.
Why are some fruits and vegetables hard to digest?
Some fruits and vegetables contain an insoluble fibre—a fibre that does not dissolve in water. While such fibre has the benefit of passing through a person’s system rather quickly, taking other foods with it, and thereby helping to clean out your system, it can also irritate the walls of your colon in the process. This can cause discomfort and even pain.
Therefore, limit eating some vegetables (more on that later) and the skins of fruits and vegetables because they can be harder to digest.
Again, the best way to tell if these are responsible for your digestive problems is to keep a food log where you note the eaten foods and how they make you feel shortly consumption. Do so for at least a week and try to identify a pattern.
If you find that your digestive system reacts well to fruits and vegetables, then move on to the next food item on the list.
Cabbage and cruciferous vegetables
Cruciferous vegetables such as cabbage, broccoli and cauliflower have a number of important nutrients needed by humans. For this reason they should not be stricken from your diet.
Why is cabbage hard to digest?
That said, however, cabbage and cruciferous vegetables contain indigestible sugars. When these sugars are digested, some people experience gas, flatulence, belching and abdominal discomfort.
Consume in small quantities, if you suspect cruciferous vegetables aggravate the symptoms.
Keep in mind that cooked cruciferous vegetables are much easier on the digestive system. If cooking does little to avert the mentioned aches and pains, eliminate them altogether to see if you feel the difference.
Corn contains a good deal of the necessary, healthy fibre, which we all need to promote digestive movement and to keep us full for longer. That’s a good thing.
Why is corn hard to digest?
Corn, however, has another type of fibre called cellulose—something humans have a difficult time breaking down. The end result: abdominal pain and gas.
If you’re going to consume corn, chew thoroughly to help digestion.
For some time now dairy has found its way onto many lists of the worst foods for digestion.
It’s important to remember that dairy doesn’t adversely affect all people, only some. It also affects people in varying degrees, so it may be hard to digest for you, but not your loved one.
Furthermore, dairy contains lactose, which is not easily broken down by the digestive system.
As you no doubt know, some people have a complete intolerance to lactose and can become seriously ill upon its consumption. The rest of us, on the other hand, may just experience some gas and bloating, the intensity and frequency of which varies from person to person.
Some people who reduce their dairy intake, experience immediate improvement in this area.
Pay heed to how you feel immediately after ingesting any dairy product.
Keep a food log that lists how you feel after certain foods are eaten to help you to identify a potential pattern. This applies to any ingested food, not just dairy.
Once you recognize a pattern, limit the food or eliminate it altogether, if need be.
What’s better for digestion: goat milk vs. cow milk?
Goat dairy is generally easier to digest because it contains lower levels of a protein called alphaS1-casein than cow’s dairy.
In addition, the fat globules in goat’s milk are much smaller than those of cow’s, further aiding in digestion. Read more about the differences
There’s a reason why for centuries the Europeans coveted spices like precious stones. Without them, food is bland and, in some cases, barely edible. Used by all cultures, spices are so great in number that most of us aren’t even familiar with many of them.
Spices, however, may impact more than just the flavour of your food. While some people don’t seem to be negatively affected upon the ingestion of spices, others are not as lucky and find them hard to digest.
The matter is complicated even further by the fact that some people are only affected by certain spices, and not others. You’ll have to gauge this yourself by keeping a close eye on how your own body reacts.
Why are spices hard to digest?
The fact is that spices are known to irritate the lining of the esophagus. Potentially, this could lead to discomfort. If you suspect spices are an irritant, consume in small amounts.
A sugar-alcohol, sorbitol is an artificial sweetener often found in sugar-free gum and a number of other sweets.
Sorbitol takes a long time to digest and may cause gas build up as a result, particularly in those who are prone to various digestive conditions.
In addition, chewing gum itself can cause you to swallow a large amount of air. This leads to trapped gas and possible discomfort or even pain, making the problem worse.
Read more about Sorbitol and its link to gastrointestinal complaints.
In short, foods such as tomatoes, oranges and lemons have been found to increase acid reflux. As such, put a limit on their consumption, if you have digestive troubles.
Here’s how you can relieve acid reflux, according to Harvard Health.
Processed foods are packaged foods that are not in their natural form. These foods are often loaded with additives, preservatives and other chemicals.
They also contain sodium, and frequently, white flour. Most of these foods lack the necessary fibre for proper digestion, and subsequently cause constipation. This makes them one of the worst foods for digestion.
Prepare foods from scratch and eat them in their most natural form instead. Doing so is not only better for digestion, but also for your health in general.
We’ve all heard the old saying that beans are hard to digest and cause flatulence. Although we need to dismiss many of the nutrition old wives’ tales as they are simply outdated and have since been proven to be misconceptions, this one is largely true.
Why are beans hard to digest?
Beans contain a complex sugar called oligosaccharide that humans cannot digest without the help of digestive enzymes.
Despite the fact that they are abundant in fibre and high in protein, which are both essential for a healthy diet, the mentioned sugar can cause digestive upset. When it enters the digestive system, it creates gas and potential discomfort.
That is not to say you should strike beans from your diet in their entirety, but consume sparingly if you’re hypersensitive.
Meats with casing
Meats such as sausages are wrapped in casing, which can be hard to digest for some. This is especially true if the casing is artificial rather than natural.
In addition, they are processed which, in and of itself, can be hard on digestion.
The combination of processing and the casing is a digestive double whammy.
Surprised to see citrus juices on the list of hard to digest foods? Most people are.
Citrus juices, however, can irritate the stomach and cause discomfort in people who are susceptible to acid reflux, often aggravating such symptoms. Pay close attention and see if juice is responsible.
This one is not much of a surprise.
The vast majority of carbonated drinks aren’t good for overall health anyway. But being acidic in nature, carbonated drinks also distend the stomach, causing discomfort in some. Carbonation doesn’t help things either. Plain and simple. Avoid.
In addition to the many adverse effects of regularly consuming alcohol in excessive amounts, certain alcoholic drinks such as beer have been known to trigger gas in some people—a fact that is not widely known by the general population.
Drinking alcohol can also inflame the lining of the stomach, preventing nutrients from being properly absorbed by your system.
What’s more, alcohol dehydrates the body. This lack of proper water intake in itself can lead to constipation, discomfort and pain. Unfortunately, the bottoms up can make your digestive system bottom out, so pay heed.
Some people find gluten difficult to digest. This does not just apply to those stricken with Celiac disease. You may even have a mild sensitivity to it and not even know it.
Breads, pastas and cereals are the usual suspects here. But there are some less obvious foods that can also contain a fair amount of gluten. Foods and drinks such as beer, certain sauces, dressings and processed foods can all carry gluten.
It’s important to keep in mind that not all people may experience troublesome symptoms after ingesting gluten, but consider reducing it, if plagued by ongoing digestive problems.
The list found here is by no means an exclusive one, but more of a sweeping guideline. Some of the foods listed are common knowledge, but the others not so much. And often, these are the foods that people tend to overlook when trying to pinpoint the causes of their digestive troubles.
If you’re a sufferer who’s looking for answers, I strongly encourage you to reduce or eliminate these foods. Look at the list, follow the suggestions, observe how you feel and discover for yourself. That’s the only sure way of knowing what affects you as an individual.
As always, I encourage everyone to seek the help of a trained health professional in the process to guide you along. Digestive problems can be overwhelming and exasperating—something with which I can certainly empathize, and as such, they require attention.
Julie Mancuso is a registered nutritionist and owner of JM Nutrition, who has been counselling clients for over 15 years. Julie’s personalized approach has helped thousands reach their health, wellness and nutrition goals.
Julie regularly lends her expertise to a variety of health publications such as Livestrong, Business Insider, Food Network, MyFitnessPal, Toronto Star, Elle Magazine and many more. For more information, see In The Press.
Julie’s blog has been named one of the Top 100 Nutrition Blogs, Websites and Newsletters to Follow in 2020 by Feedspot. So don’t miss out and subscribe to both her newsletter and blog.